Initial checkin of AOSP Messaging app.

b/23110861

Change-Id: I11db999bd10656801e618f78ab2b2ef74136fff1

src/com/android/messaging/ui/SnackBarInteraction.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.messaging.ui;
+
+import android.view.Gravity;
+import android.view.View;
+import android.view.ViewPropertyAnimator;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * An interface that defines how a component can be animated with an {@link SnackBar}.
+ */
+public interface SnackBarInteraction {
+    /**
+     * Returns the animator that will be run in reaction to the given SnackBar being shown.
+     *
+     * Implementations may return null here if it determines that the given SnackBar does not need
+     * to animate this component.
+     */
+    ViewPropertyAnimator animateOnSnackBarShow(SnackBar snackBar);
+
+    /**
+     * Returns the animator that will be run in reaction to the given SnackBar being dismissed.
+     *
+     * Implementations may return null here if it determines that the given SnackBar does not need
+     * to animate this component.
+     */
+    ViewPropertyAnimator animateOnSnackBarDismiss(SnackBar snackBar);
+
+    /**
+     * A basic implementation of {@link SnackBarInteraction} that assumes that the
+     * {@link SnackBar} is always shown with {@link Gravity#BOTTOM} and that the provided View will
+     * always need to be translated up to make room for the SnackBar.
+     */
+    public static class BasicSnackBarInteraction implements SnackBarInteraction {
+        private final View mView;
+
+        public BasicSnackBarInteraction(final View view) {
+            mView = Preconditions.checkNotNull(view);
+        }
+
+        @Override
+        public ViewPropertyAnimator animateOnSnackBarShow(final SnackBar snackBar) {
+            final View rootView = snackBar.getRootView();
+            return mView.animate().translationY(-rootView.getMeasuredHeight());
+        }
+
+        @Override
+        public ViewPropertyAnimator animateOnSnackBarDismiss(final SnackBar snackBar) {
+            return mView.animate().translationY(0);
+        }
+    }
+}